Bug#927849: [gnome-control-center] Cannot set default printer

[Andreas Heinlein]

Package: gnome-control-center
Version: 1:3.22.2-3
Severity: normal

--- Please enter the report below this line. ---
We have a setup where all printers are shared by a central CUPS server.
Clients use cups-browsed and DNS-SD to auto-discover them.

With this setup, it is not possible to select a default printer as a
normal user. The relevant checkbox is grayed out and only becomes
available after unlock, which needs membership of the lpadmin group.
This is usually not wanted in an organizational network.

"lpoptions -d" on the command line works as expected, and the control
center even reflects these changes with a checkmark on the default
printer. Why is it not possible to change it?


--- System information. ---
Architecture:
Kernel: Linux 4.19.0-0.bpo.4-amd64

Debian Release: 9.8
900 stable-updates deb.debian.org
900 stable deb.debian.org
500 stretch fai-project.org
500 icinga-stretch packages.icinga.com
100 stretch-backports deb.debian.org

--- Package information. ---
Depends (Version) | Installed
================================================-+-===================
libaccountsservice0 (>= 0.6.40) | 0.6.43-1
libatk1.0-0 (>= 1.12.4) | 2.22.0-1
libc6 (>= 2.4) | 2.24-11+deb9u4
libcairo-gobject2 (>= 1.10.0) | 1.14.8-1
libcairo2 (>= 1.10.0) | 1.14.8-1
libcanberra-gtk3-0 (>= 0.25) | 0.30-3
libcanberra0 (>= 0.2) | 0.30-3
libcheese-gtk25 (>= 3.18.0) | 3.22.1-1+b1
libcheese8 (>= 3.18.0) | 3.22.1-1+b1
libclutter-1.0-0 (>= 1.23.4) | 1.26.0+dfsg-3
libclutter-gtk-1.0-0 (>= 0.91.8) | 1.8.2-2
libcolord-gtk1 (>= 0.1.24) | 0.1.26-1.1
libcolord2 (>= 0.1.31) | 1.3.3-2
libcups2 (>= 1.6.0) | 2.2.1-8+deb9u3
libfontconfig1 (>= 2.11) | 2.11.0-6.7+b1
libgdk-pixbuf2.0-0 (>= 2.25.2) | 2.36.5-2+deb9u2
libglib2.0-0 (>= 2.44.0) | 2.50.3-2
libgnome-bluetooth13 (>= 3.18.2) | 3.20.1-1
libgnome-desktop-3-12 (>= 3.21.4) | 3.22.2-1
libgoa-1.0-0b (>= 3.16.2) | 3.22.5-1
libgoa-backend-1.0-1 (>= 3.10.0) | 3.22.5-1
libgrilo-0.3-0 (>= 0.3.0) | 0.3.2-2
libgtk-3-0 (>= 3.22.0) | 3.22.11-1
libgtop-2.0-10 (>= 2.22.3) | 2.34.2-1
libgudev-1.0-0 (>= 146) | 230-3
libibus-1.0-5 (>= 1.5.2) | 1.5.14-3+deb9u1
libkrb5-3 (>= 1.8+dfsg) | 1.15-1+deb9u1
libmm-glib0 (>= 0.7.991) | 1.6.4-1
libnm0 (>= 1.1.90) | 1.6.2-3+deb9u2
libnma0 (>= 1.1.90) | 1.4.4-1+deb9u1
libpango-1.0-0 (>= 1.18.0) | 1.40.5-1
libpangocairo-1.0-0 (>= 1.18.0) | 1.40.5-1
libpolkit-gobject-1-0 (>= 0.99) | 0.105-18+deb9u1
libpulse-mainloop-glib0 (>= 0.99.1) | 10.0-1+deb9u1
libpulse0 (>= 0.99.1) | 10.0-1+deb9u1
libpwquality1 (>= 1.1.0) | 1.3.0-1+b1
libsmbclient (>= 2:4.0.3+dfsg1) | 2:4.5.16+dfsg-1+deb9u1
libsoup2.4-1 (>= 2.33.92) | 2.56.0-2+deb9u2
libupower-glib3 (>= 0.99.0) | 0.99.4-4+b1
libwacom2 (>= 0.7) | 0.22-1+b1
libx11-6 | 2:1.6.4-3+deb9u1
libxi6 (>= 2:1.2.99.4) | 2:1.7.9-1
libxml2 (>= 2.7.4) | 2.9.4+dfsg1-2.2+deb9u2
accountsservice | 0.6.43-1
apg | 2.2.3.dfsg.1-4+b1
colord (>= 0.1.30) | 1.3.3-2
desktop-file-utils | 0.23-1
gnome-control-center-data (<< 1:3.23) | 1:3.22.2-3
gnome-control-center-data (>= 1:3.22.2-3) | 1:3.22.2-3
gnome-desktop3-data | 3.22.2-1
gnome-settings-daemon (>= 3.19.1) | 3.22.2-2+deb9u2
gsettings-desktop-schemas (>= 3.21.4) | 3.22.0-1


Recommends (Version) | Installed
===========================================-+-===========
cups-pk-helper | 0.2.6-1+b1
gnome-online-accounts | 3.22.5-1
gnome-user-guide | 3.22.0-1
gnome-user-share | 3.18.3-1+b1
gkbd-capplet | 3.22.0.1-1+b1
iso-codes | 3.75-1
libcanberra-pulse | 0.30-3
mousetweaks | 3.12.0-1+b1
policykit-1 | 0.105-18+deb9u1
rygel | 0.32.1-3
OR rygel-tracker | 0.32.1-3
system-config-printer-common (>= 1.4) | 1.5.7-3
network-manager-gnome (>= 0.9.8) | 1.4.4-1+deb9u1
libnss-myhostname | 232-25+deb9u11
cracklib-runtime | 2.9.2-5
pulseaudio-module-bluetooth | 10.0-1+deb9u1
realmd | 0.16.3-1


Suggests (Version) | Installed
======================================-+-===========
gstreamer1.0-pulseaudio | 1.10.4-1
libcanberra-gtk-module | 0.30-3
libcanberra-gtk3-module | 0.30-3
x11-xserver-utils | 7.7+7+b1